*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f4f5f7;
  color: #1a1a2e;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Navbar ── */
.navbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 2rem;
  height: 60px;
  background: #1a1a2e;
  color: #fff;
}

.navbar .brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  margin-right: auto;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.25rem;
}

.nav-links a {
  color: #bbb;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: #fff; }

.navbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.group-badge {
  font-size: 0.85rem;
  color: #aad4ff;
  background: rgba(255,255,255,.08);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
}

.btn-link {
  background: none;
  border: none;
  color: #888;
  cursor: pointer;
  font-size: 0.8rem;
  text-decoration: underline;
  padding: 0;
}
.btn-link:hover { color: #fff; }

.btn-outline {
  background: transparent;
  border: 1px solid #555;
  color: #ccc;
  padding: 0.3rem 0.9rem;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.btn-outline:hover { border-color: #fff; color: #fff; }

/* ── Main ── */
.container {
  flex: 1;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 3rem 0;
}
.hero .lead {
  margin: 1rem auto 2rem;
  max-width: 480px;
  color: #555;
  font-size: 1.05rem;
}
.group-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: #888;
  margin-bottom: 0.5rem;
}
.group-number {
  font-size: 5rem;
  font-weight: 800;
  color: #1a1a2e;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.group-name {
  font-size: 1.1rem;
  color: #666;
  margin-bottom: 2rem;
}

/* ── Buttons ── */
.btn-primary {
  display: inline-block;
  background: #1a1a2e;
  color: #fff;
  border: none;
  padding: 0.7rem 1.8rem;
  border-radius: 8px;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.85; }

.btn-ghost {
  background: transparent;
  border: 1px solid #ccc;
  color: #555;
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: border-color 0.2s;
}
.btn-ghost:hover { border-color: #999; }

/* ── Tasks ── */
.tasks-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.tasks-header h1 { font-size: 1.8rem; }

.task-list { display: flex; flex-direction: column; gap: 0.75rem; }

.task-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: #fff;
  border-radius: 10px;
  padding: 1rem 1.25rem;
  box-shadow: 0 1px 6px rgba(0,0,0,.07);
  transition: box-shadow 0.2s;
}
.task-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.12); }

.task-id {
  font-weight: 700;
  font-size: 1rem;
  color: #888;
  min-width: 2.5rem;
}

.task-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.task-title { font-size: 1rem; font-weight: 600; }

.task-heading {
  font-size: 0.82rem;
  color: #888;
}

.task-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: #1a1a2e;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  background: #f0f1f3;
  padding: 0.35rem 0.9rem;
  border-radius: 6px;
  transition: background 0.2s;
}
.task-link:hover { background: #e0e2e6; }

/* ── Modal ── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(3px);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
.modal-overlay.active { display: flex; }

.modal {
  background: #fff;
  border-radius: 14px;
  padding: 2rem 2.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.modal h2 { margin-bottom: 0.5rem; font-size: 1.4rem; }
.modal p { color: #666; margin-bottom: 1.5rem; font-size: 0.9rem; }

.modal-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid #ddd;
  border-radius: 8px;
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  outline: none;
  transition: border-color 0.2s;
}
.modal-input:focus { border-color: #1a1a2e; }

.modal-actions { display: flex; gap: 0.75rem; }

/* ── Footer ── */
.footer {
  text-align: center;
  padding: 1.25rem;
  background: #1a1a2e;
  color: #666;
  font-size: 0.8rem;
}